first updates
admin-ldap grammar
backgroundjobs grammar
custom_clients grammar
language config typo
config mail case
config preview
config user_backend
config xsendfile
installation part 1
installation source page
Merge pull request #360 from aykit/stable6

Changed configuring_big_file_upload.rst to reflect .htaccess, ...
Conflicts:
	admin_manual/configuration/configuring_big_file_upload.rst

Conflicts:
	admin_manual/configuration/configuring_big_file_upload.rst
config apps and database
install source
Merge pull request #359 from owncloud/admin-man-updates

Admin manual updates